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falcosecurity / event-generator

Generate a variety of suspect actions that are detected by Falco rulesets
Apache License 2.0
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feat(decl/proc-chain): add user and capabilities support #242

Closed ekoops closed 9 hours ago

ekoops commented 4 days ago

What type of PR is this?

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What this PR does / why we need it: This PR adds the capability to specify the user and the linux capabilities a process in the process chain can be run with.

Capabilities can only be specified for the leaf process. Omitting capabilities is equivalent to specify all=iep.

Each process in the chain runs with real user/group ID equals to 0 (root). Specifying a user sets the effective and the saved set-user/group-ID to the corresponding user/group IDs. If a user specified in the chain doesn't exist, it is created before running the test and deleted after test execution.

The securebit SECBBIT_NOROOT is enabled on the calling thread before creating any child process: this is done in order to prevent the kernel from ignoring the specified capabilities when the real user ID is zero (see 'Capabilities and execution of programs by root' in capabilities(7)).

Users who wish to run the before and after script or creating a 'process' test resource must take into account to provide at least CAP_SETPCAP in its permitted and effective set.

Which issue(s) this PR fixes:

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poiana commented 9 hours ago

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alacuku, ekoops

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/falcosecurity/event-generator/blob/declarative-testing/OWNERS)~~ [alacuku] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment
poiana commented 9 hours ago

LGTM label has been added.

Git tree hash: 46d6ae45be096f70da58cf932af61b147b5cac82